| 1. | An omnibus volume containing the three light novels was released in June 2011.
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| 2. | It was reissued in 2008 in two omnibus volumes collecting five albums each.
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| 3. | The last three volumes were published in a single omnibus volume.
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| 4. | In February 2008, Tokyopop reissued the first three volumes in a single omnibus volume.
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| 5. | Several important essays have found their way as introductions for anthologies or omnibus volumes.
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| 6. | In 2000 01, the twelve volumes were republished in three limited edition omnibus volumes.
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| 7. | Three omnibus volumes were released simultaneously on October 15, 2012.
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| 8. | It is now available as part of the omnibus volume " Novelties and Souvenirs ".
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| 9. | In 2003, it was republished in the omnibus volume, " Empire from the Ashes ".
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| 10. | Seven Seas Entertainment has also released 4 omnibus volumes.
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